I used with these guys with great success lots of £££ saved.
Phone Alloy Wheels, Tyres, Exhausts, Suspension, Air Filters, Brakes from RTecShop.com for a best quote. They are at St Albans just off M25. These are the wheel experts and very help full. Prices may have crept up of course.

I recommend for standard wheels Falken FK 452
rear 275x19x35 £149.00 (slightly wider to fill rim)
front 225x18x40 £100.00 (standard size)

They have loads of choices/prices. They supplied my wheels and tyres which are different sizes to standard and were very professional. I will go back again next time.